The claim refers to the well-known Height of Buildings Act of 1910 governing Washington, D.C., which is a matter of statutory fact rather than a subject of empirical research literature.
The claim is a well-known legal and historical fact about the building height restrictions in Washington, D.C. (governed by the Height of Buildings Act of 1910). None of the retrieved papers discuss Washington D.C. architecture; they focus on unrelated topics such as regenerative agriculture, adolescent obesity, diets, satellite data, suicide barriers, dementia, plague disinfection, and urban building height regulations in other countries (Indonesia, South Korea, Japan). Since the claim is a matter of established public law and everyday geographical knowledge, it is classified as COMMON_KNOWLEDGE.